Accession Number : AD1037540


Title :   Physical and chemical study of single aerosol particles using optical trapping cavity ringdown spectroscopy


Descriptive Note : Technical Report,01 Sep 2013,31 Aug 2016


Corporate Author : Mississippi State University Mississippi State United States


Personal Author(s) : Wang,Chuji ; Gong,Zhiyong ; Pan,Yong-Le


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1037540.pdf


Report Date : 30 Aug 2016


Pagination or Media Count : 32


Abstract : We report a new single-aerosol particle scope using an optical trapping-cavity ringdown spectroscopy (OT-CRDS) technique. The scope can not only view physical parameters such as size, motion, restoring force constant of a single aerosol particle trapped in air, but also display time-, particle-, or wavelength-resolved chemical properties such as single aerosol particle extinction. We demonstrate the scope by trapping and walking single carbon-nanotube particles of approx.50 micrometers m in size and viewing those properties via changes of ringdown time. This single-aerosol particle scope offers a new, powerful tool to study both physical and chemical properties as well as their evolving dynamics.


Descriptors :   aerosols , optical properties , chemical properties , particle size , spectroscopy , laser spectroscopy , measurement , chemistry , lasers , surface properties , surface chemistry , carbon nanotubes


Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE